- Overview of the CB Exam's Six Domains
- Domain 1: Mastering Adjusting Entries
- Domain 2: Mastering Correction of Accounting Errors
- Domain 3: Mastering Payroll
- Domain 4: Mastering Depreciation
- Domain 5: Mastering Inventory
- Domain 6: Mastering Internal Controls and Fraud Prevention
- How the Domains Map to Exam Format and Fees
- Scheduling Your Study Around the Six Domains
- Frequently Asked Questions
- Parts 1 and 2 (adjusting entries, error correction) are timed Prometric tests requiring a 75% passing grade.
- Parts 3 and 4 (payroll, depreciation, plus inventory and internal controls) are open-book workbook finals with a 70% passing grade and no time limit.
- Adjusting entries, error correction, payroll, and depreciation carry the highest timed-test priority.
- All six workbooks together cost $479 for AIPB members or $574 for nonmembers, including both $100 Prometric fees.
Overview of the CB Exam's Six Domains
The Certified Bookkeeper credential, administered by the American Institute of Professional Bookkeepers (AIPB), is built around six distinct content areas. Unlike many certification exams that blend topics into a single test, the CB exam splits its content across four separate multiple-choice parts, each tied to specific workbooks and domains. Understanding how these six domains connect to the four exam parts is the single most important organizing principle for anyone preparing for this credential.
This guide breaks down each domain in detail - what it covers, why it matters, and how heavily it's weighted on the timed portion of the exam. If you're just getting oriented with the certification itself, our overview of CB Certification and our explainer on What Is CB Certification? are good starting points before diving into domain-level detail.
Domain 1: Mastering Adjusting Entries
Adjusting entries form the foundation of Part 1 of the CB exam, and they're consistently identified as one of the highest-priority topics on the timed test. This domain tests whether a candidate truly understands accrual accounting - not just how to memorize journal entry formats, but why entries are made and when.
Adjusting Entries
Candidates must understand how to bring account balances up to date at the end of an accounting period so financial statements reflect the correct period's activity.
- Accrued revenues and accrued expenses
- Prepaid expenses and unearned revenue allocation
- Recognizing and recording bad debts
- Adjusting for supplies, insurance, and other deferred items
- Interest accrual calculations on notes payable and receivable
Because this is a timed, Prometric-delivered section, speed matters as much as accuracy. Candidates who can quickly identify which type of adjustment a scenario calls for - without re-deriving the logic from scratch - move through Part 1 far more efficiently. For a broader sense of how difficult this section tends to feel relative to the rest of the exam, see How Hard Is the CB Exam? Complete Difficulty Guide 2026.
Domain 2: Mastering Correction of Accounting Errors
Error correction is the second half of Part 1's timed content and is just as heavily weighted as adjusting entries. This domain asks candidates to spot mistakes in previously recorded transactions and determine the correct fix - often across multiple accounting periods.
Correction of Accounting Errors
Candidates need to identify errors of omission, commission, and principle, then determine whether a correcting entry, a reversing entry, or a restatement is required.
- Errors affecting the trial balance versus errors that don't
- Correcting entries for prior-period misstatements
- Locating errors using suspense accounts
- Distinguishing between errors that self-correct and those that don't
This is one of the domains candidates most frequently underestimate. It requires you to work backward from an outcome (an out-of-balance trial balance, for instance) to a root cause - a skill that's more analytical than mechanical. Practicing timed drills on this topic specifically is one of the better uses of study time, and it's covered in depth in our CB Study Guide 2026: How to Pass on Your First Attempt.
Domain 3: Mastering Payroll
Payroll is one of the largest domains on the CB exam and appears on the Part 3 open-book, back-of-the-workbook final. Because Part 3 has no time limit and a 70% passing grade, candidates can work methodically - but the sheer breadth of payroll law and calculation detail means preparation still matters enormously.
Payroll
This domain covers the full payroll cycle, from employee classification through tax deposit deadlines.
- Calculating gross pay, overtime, and net pay
- Federal income tax withholding and FICA computations
- Employer payroll tax liabilities (FUTA, SUTA)
- Payroll journal entries and general ledger posting
- Recordkeeping requirements and payroll tax deposit rules
Because payroll is flagged as one of the highest timed-test priority areas alongside adjusting entries, error correction, and depreciation, candidates shouldn't assume the open-book format on this workbook final makes it low-stakes. The volume of calculation-heavy questions means familiarity with formulas needs to be automatic, not something you look up mid-exam. If you're trying to gauge whether payroll expertise gained here translates into job opportunities, our CB Jobs guide covers where this skill set is in demand.
Domain 4: Mastering Depreciation
Depreciation rounds out the second half of Part 3's workbook content and is another domain explicitly called out as high-priority. This section tests a candidate's ability to apply multiple depreciation methods correctly and to understand when each is appropriate.
Depreciation
Candidates must be comfortable moving between depreciation methods depending on asset type and reporting purpose.
- Straight-line, units-of-production, and declining-balance methods
- MACRS for tax reporting purposes
- Calculating and recording gains or losses on asset disposal
- Partial-year depreciation calculations
- Adjusting depreciation schedules after asset improvements
Key Takeaway
Because adjusting entries, error correction, payroll, and depreciation are the four domains with the highest timed-test priority, allocate more repetition to these than to inventory or internal controls when your study time is limited.
Domain 5: Mastering Inventory
Inventory accounting is tested on the workbook final portion of the exam and covers the methods bookkeepers use to value goods on hand and cost of goods sold. While it doesn't carry the same timed-test priority as the first four domains, it's still a required area of mastery for certification.
Inventory
This domain focuses on costing methods and their impact on financial statements.
- FIFO, LIFO, and weighted-average costing
- Periodic versus perpetual inventory systems
- Calculating cost of goods sold
- Identifying and recording inventory shrinkage and write-downs
- Lower-of-cost-or-market adjustments
Candidates coming from retail, distribution, or manufacturing bookkeeping roles often find this domain intuitive, since they've applied these concepts on the job. Those without that background should budget extra workbook time here, since the concepts (particularly LIFO/FIFO distinctions) are frequently tested in scenario form rather than as simple definitions.
Domain 6: Mastering Internal Controls and Fraud Prevention
The final domain, internal controls and fraud prevention, is tested on Part 4's open-book workbook final. This section shifts away from calculation-heavy questions toward conceptual and procedural knowledge - understanding how to design and evaluate a system of checks that protects a business's assets.
Internal Controls and Fraud Prevention
Candidates need to recognize control weaknesses and recommend appropriate safeguards.
- Segregation of duties principles
- Cash handling and bank reconciliation controls
- Common schemes: skimming, larceny, and check tampering
- Authorization and approval procedures for disbursements
- Physical safeguards over inventory and records
This domain rewards candidates who think like auditors: given a described business process, can you spot where fraud could occur and what control would prevent it? It's less about memorizing definitions and more about applying judgment to scenarios - a different mental mode than the calculation-heavy domains earlier in the exam.
How the Domains Map to Exam Format and Fees
The six domains don't carry equal weight in terms of test format. Domains 1 and 2 (adjusting entries and error correction) make up Parts 1 and 2, delivered at Prometric testing centers under a strict 2-hour limit with a 75% passing grade. Domains 3 through 6 (payroll, depreciation, inventory, and internal controls) appear on Parts 3 and 4, which are open-book, back-of-the-workbook finals with no time limit and a 70% passing grade.
| Exam Part | Domains Covered | Format | Passing Grade |
|---|---|---|---|
| Part 1 | Adjusting Entries | Timed, Prometric, 2-hour limit | 75% |
| Part 2 | Correction of Accounting Errors | Timed, Prometric, 2-hour limit | 75% |
| Part 3 | Payroll, Depreciation | Open-book workbook final, no time limit | 70% |
| Part 4 | Inventory, Internal Controls & Fraud Prevention | Open-book workbook final, no time limit | 70% |
This structure has direct implications for how you register and pay. The official self-study path costs $479 for AIPB members and $574 for nonmembers, which includes enrollment, all six workbooks, and both $100 Prometric fees for Parts 1 and 2. If you fail a Prometric-delivered part, you can retake it after 30 days for a $60 fee; workbook-final retakes carry no additional fee at all. For a full cost breakdown across every scenario, see CB Certification Cost 2026: Complete Pricing Breakdown, and for the exact numeric thresholds by part, check CB Passing Score 2026: Exactly What You Need to Pass.
Certification isn't granted on exam passage alone. Candidates must also complete the AIPB Code of Ethics and document at least 2 years of full-time bookkeeping experience, or 3,000 hours of part-time or freelance experience, which can be finished within 3 years after passing all four parts. Once certified, maintaining the designation requires 60 CPECs every 3 years. Full eligibility details are covered in CB Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Scheduling Your Study Around the Six Domains
Because the six domains split cleanly across two timed parts and two open-book parts, an effective study plan treats them differently rather than applying one generic method to all six. Timed-test domains (adjusting entries, error correction) benefit from repeated drills under time pressure; open-book domains (payroll, depreciation, inventory, internal controls) benefit more from workbook review paired with practice scenarios you can reason through slowly.
Adjusting Entries & Error Correction
- Work through the first two workbooks in full
- Run timed practice sets to simulate the 2-hour Prometric limit
- Focus repetition on accrual/deferral logic and trial-balance error tracing
Payroll & Depreciation
- Build fluency with payroll tax calculations and depreciation methods
- Practice open-book scenario questions without a strict clock
- Review MACRS tables and payroll deposit schedules until automatic
Inventory & Internal Controls
- Work through costing method comparisons and shrinkage scenarios
- Study common fraud schemes and matching controls
- Complete full workbook finals for Parts 3 and 4
Full Review and Scheduling
- Take full-length timed practice exams for Parts 1 and 2
- Schedule Prometric sessions and confirm calculator compliance
- Revisit weak domains identified through practice test results
This kind of structured pacing is one of the few places where generic study methodology genuinely applies to CB prep - the key is anchoring each week to a specific domain and exam format rather than studying everything in a blended, undifferentiated way. For registration windows and deadlines that should inform when you start this schedule, see CB Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Frequently Asked Questions
Only Domain 1 (Adjusting Entries) and Domain 2 (Correction of Accounting Errors) are timed. They make up Parts 1 and 2, delivered at Prometric with a 2-hour limit and a 75% passing grade.
They have no time limit and a lower passing grade of 70%, but they cover four dense domains - payroll, depreciation, inventory, and internal controls - so thorough workbook preparation is still essential.
Adjusting entries, error correction, payroll, and depreciation carry the highest timed-test priority, so they deserve the most repetition if your schedule is tight.
A failed Prometric part (Domains 1 or 2) can be retaken after 30 days for a $60 fee. Workbook-final retakes covering Domains 3 through 6 have no retake fee at all.
Yes. Certification requires passing all four exam parts covering all six domains, completing the AIPB Code of Ethics, and meeting the required bookkeeping experience hours.